4 for Android 5.0 and 5.1 before Play Services v8, Android >= 6.0 after

5 for Android Wear

7 for Android 5.0

8 for Android TV

9 for Android 8.0+

* Y defines CPU architecture:

1 for armeabi

3 for armeabi-v7a

4 for arm64-v8a

5 for mips

7 for x86

8 for x86_64

* Z defines DPI:

0 for universal nodpi

2 for 160

4 for 240

6 for 320

8 for 480

Notes:

It seems that 7YZ builds became 4YZ with Google Play services v6.5. If you were on 7YZ before, you should now install 4YZ.

It seems that 4YZ builds got split into 2YZ for Lollipop and 4YZ for Marshmallow with Google Play services v8. If you were on 4YZ before, you should now install 2YZ in Lollipop and 4YZ in Marshmallow.

Examples:

014 for Android <5.0 armeabi CPU 240 DPI device

438 for Android 6.0+ armeabi-v7a CPU 480 DPI device

876 for Android TV x86 CPU 320 DPI device

940 for Android 8.0+ arm64 CPU nodpi device

This release does not have a Play Store Description, so we grabbed one from version 11.5.17:

Google Play services is used to update Google apps and apps from Google Play.
This component provides core functionality like authentication to your Google services, synchronized contacts, access to all the latest user privacy settings, and higher quality, lower-powered location based services.
Google Play services also enhances your app experience. It speeds up offline searches, provides more immersive maps, and improves gaming experiences.
Apps may not work if you uninstall Google Play services.

This release comes in several variants. Consult our handy FAQ to see which download is right for you.